A study conduct to find out the effect of 3-row belts of Eucalyptus camaldulensis on the yield of Agricultural crops has indicated that when the trees were 5 to 6 meter in height and wheat was sown the yield was not depressed. However, in the case of cotton, when the height of the tree belts was up to 7 meter the yield was comparatively poor within a distance of 15-30 meter on either side of the belt.